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request_scroll(3) Allegro manual request_scroll(3) NAME request_scroll - Queues a hardware scroll request with triple buffer- ing. Allegro game programming library. SYNOPSIS #include <allegro.h> int request_scroll(int x, int y); DESCRIPTION This function is used for triple buffering. It requests a hardware scroll to the specified position, but returns immediately rather than waiting for a retrace. The scroll will then take place during the next vertical retrace, but you can carry on running other code in the mean- time and use the poll_scroll() routine to detect when the flip has ac- tually taken place. Triple buffering is only possible with certain drivers: you can look at the GFX_CAN_TRIPLE_BUFFER bit in the gfx_capabilities flag to see if it will work with the current driver. RETURN VALUE This function returns zero on success, non-zero otherwise. SEE ALSO poll_scroll(3), request_video_bitmap(3), gfx_capabilities(3), scroll_screen(3) Allegro version 4.4.3 request_scroll(3)
NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | SEE ALSO
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